In the game fifa world cup your on a clear breakaway, but you instead pass it back to the next guyrunning down the field to strike the ball in the goal. Such as a one timer in hockey. It takes away from the legitmacy of the goal.
"Dude you dick you just pulled a glackin you could have just scored with the firstguy. Dick."
Named after the Jim Glickenhaus, the defiant hunk of a man who created the Glickenhaus SCG007 Hypercar, it's describing the rejection of odds of winning a motorsport race by cursing their winning opponents with mechanical failures (known as "Glickening").
I won Le mans 24 Hours by yelling "It's glickin time". All the cars in front of me just spontaneously exploded on the last hour.